EP0723087A1 - Wälzlager, insbesondere Hinterlager für einen Kraftfahrzeugalternator - Google Patents

Wälzlager, insbesondere Hinterlager für einen Kraftfahrzeugalternator Download PDF

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Publication number
EP0723087A1
EP0723087A1 EP96400091A EP96400091A EP0723087A1 EP 0723087 A1 EP0723087 A1 EP 0723087A1 EP 96400091 A EP96400091 A EP 96400091A EP 96400091 A EP96400091 A EP 96400091A EP 0723087 A1 EP0723087 A1 EP 0723087A1
Authority
EP
European Patent Office
Prior art keywords
bearing
ring
washer
shaft
shoulder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP96400091A
Other languages
English (en)
French (fr)
Other versions
EP0723087B1 (de
Inventor
Marcel Vogelsberger
Daniel Davoigneau
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Equipements Electriques Moteur SAS
Original Assignee
Valeo Equipements Electriques Moteur SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Equipements Electriques Moteur SAS filed Critical Valeo Equipements Electriques Moteur SAS
Publication of EP0723087A1 publication Critical patent/EP0723087A1/de
Application granted granted Critical
Publication of EP0723087B1 publication Critical patent/EP0723087B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
    • F16C25/06—Ball or roller bearings
    • F16C25/08—Ball or roller bearings self-adjusting
    • F16C25/083—Ball or roller bearings self-adjusting with resilient means acting axially on a race ring to preload the bearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2380/00—Electrical apparatus
    • F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators

Definitions

  • the present invention relates to rolling bearings for rotating machines.
  • the bearing of a bearing is maintained on its support by means of plastic capsules or washers or of steel inserts (stop ring for example).
  • the rear bearing of an alternator means the bearing located on said alternator on the side opposite to the drive.
  • the outer ring of the bearing can undergo a rotation which destroys the bearing.
  • the axial clearance of the bearings and the vibrations at high speed can cause the destruction of the raceways on the rings.
  • the vibrations and percussions due to this play can also lead to premature wear of the bearing or of its housing on the bearing support.
  • Document FR-A-1 135 722 describes a machine bearing with a rotating shaft comprising a bearing mounted between a support and the shaft.
  • the outer ring of the bearing is rigidly fixed to the support while the inner ring can slide relative to the shaft.
  • a column made up of two plate springs is interposed between the internal ring and a shoulder of the shaft to exert a force tending to spread them apart to cancel the axial operating clearance.
  • the plate springs have a very high stiffness so that they manifest significant elasticity only under the effect of high stresses. It follows that the axial play is taken up only in return for significant axial stresses on the parts, which affects the proper functioning of the bearing.
  • the invention provides a bearing for a rotating shaft machine comprising a bearing mounted between a bearing support and the shaft, the bearing comprising an outer ring and an inner ring between which are interposed rolling elements, the ring external being rigidly held on the support, the internal ring and the shaft being sliding relative to each other, the bearing comprising at least one washer mounted between the internal ring and a shoulder of the shaft and exerting between the internal ring and the shoulder an effort tending to move them aside to cancel the operating clearances, characterized in that the washer has a flat ring and a plurality of elastic trapezoidal legs extending radially from the ring, having a portion inclined relative to the plane of the ring and terminated by an end flat parallel to the plane of the ring.
  • the radial lugs deform elastically independently of each other.
  • the washer with radial legs therefore has a lower stiffness than the plate springs of comparable dimensions. The washer thus allows an elastic force to be exerted to make up for the axial play between the parts without excessive axial stress on them.
  • the invention also relates to such a rear bearing of an alternator, in particular of a motor vehicle, as well as an alternator comprising such a bearing.
  • the alternator rear bearing which has been shown in FIG. 1 comprises a bearing 1 mounted in a housing 2 formed on a flange 3 at the end of the alternator. This bearing rotates the shaft, referenced by A, from the alternator.
  • the bearing 1 comprises an outer ring 4 rigidly mounted in the housing 2 and an inner ring 5 slidably mounted on the shaft A.
  • the rolling elements are balls 6 mounted between the raceways that the two rings 4 and 5 have.
  • the housing 2 which receives the bearing 1 has a cylindrical internal contour, the diameter of which corresponds to the external diameter of the ring 4.
  • This housing 2 is closed by a bottom 2a at its end on the side of the external face of the flange 3.
  • This bottom 2a has an annular surface 2b which projects inside the housing 2 and on which the outer ring 4 comes to bear.
  • the internal diameter of this annular bearing 2b is slightly greater than the internal diameter of the outer ring 4, so that there is a clearance between the inner ring 5 and the bottom 2a.
  • the outer ring 4 is held by tightening in the housing 2 by means of an annular plate 9 which is attached to the internal face of the flange 3 and which is fixed to said flange 3 by several screws 10.
  • the internal diameter of this plate 9 is slightly smaller than the outside diameter of the outer ring 4 of the bearing, so that this plate 9 extends partially in line with the edge of the outer ring 4. The screwing is carried out so as to tighten the ring 4 against the annular bearing 2b.
  • the external face of the flange 3 has, to the right of the bearing surface 2b, an annular stiffening rib 3a.
  • the external diameter of this rib 3a is greater than the internal diameter of the housing 2.
  • the bearing comprises an elastic washer 7, passed over the shaft A, inside the alternator.
  • This washer 7 is mounted in the axial direction between, on the one hand, an annular shoulder 8 which has the shaft A and, on the other hand, the inner ring 5 of the bearing 1.
  • the washer 7 is elastically compressed between this shoulder 8 and the inner ring 5. It pushes said inner ring 5 axially towards the bottom 2a, so that all operating games are canceled.
  • the shoulder 8 extends inside the casing of the alternator, beyond the internal face of the flange 3.
  • the outer ring 4 of the bearing 1 is rigidly fixed on the bearing support which constitutes the flange 3.
  • the inner ring 5 and the shaft A are sliding one relative to the other in both directions of the axial direction.
  • the operating clearances are canceled out by the force exerted by the washer 7 between said ring 5 and the shoulder 8.
  • the elastic washer 7 of the bearing structure according to the invention can of course take different configurations.
  • the elastic washer 7 which is represented in FIGS. 1 to 3 is a metal or plastic part which has a flat outer ring 11 and a plurality of trapezoidal elastic tabs 12, which extend radially from said outer ring 11, towards the inside said washer 7.
  • These elastic tabs 12 are located at the level of the flat outer ring 11. These tabs 12 each end at their small base with a flat 12a of support parallel to the plane of the flat ring. This flat 12a is connected to the flat ring 11 by an elastic portion 12b alternately inclined on one side or the other of the plane of the flat ring 11 around the periphery of the washer 7.
  • the flats 12a are thus alternately supported, some on a flat edge of the inner ring 5, the others on the shoulder 8. They thus ensure the placing under prestressing of the bearing 1 and of the shaft A by making surface-to-surface contacts therewith.
  • the internal diameter that these flats 12a define for the elastic washer 7 changes as a function of the crushing suffered by the latter.
  • the number of elastic tabs 12 is advantageously chosen to be even (8, 10 or 12 for example).
  • This embodiment comprises a single washer. It is particularly economical to manufacture and assemble.
  • the bearing of FIGS. 4 to 6 comprises in particular a bearing 101 received in a housing 102 of a flange 103.
  • This bearing 101 consists of an outer ring 104, an inner ring 105 and balls 106.
  • An annular elastic element 117 is elastically interposed between the internal ring 105 and a shoulder 108 which the shaft A of the alternator has.
  • the elastic element 117 consists of two washers 118. These two washers 118 each have a flat internal ring 119 and a plurality of elastic trapezoidal tabs 120, which extend radially from said internal ring 119, towards the outside.
  • These legs 120 each have an elastic portion 120b inclined relative to the plane of the ring, which connects an end flat 120a (parallel to the plane of the flat ring) which terminates them at their small base, at the flat ring 119.
  • the flats 120a of the two washers 118 are in mutual support and are secured to each other for example by electrical welding.
  • the two rings 119 are separated from each other by the elastic portions 120b.
  • the two rings 119 are elastically crushed towards one another by being in contact one with the shoulder 108, the other with the inner ring 105 of the bearing 101.
  • the internal diameter of these rings is constant.
  • the number and dimensions of the blades defined by the legs 120 are adjusted with the thickness of the washers 118 according to the effort and the desired stroke.
  • This elastic piece in one piece makes mounting particularly simple to perform.
  • the bearing of FIGS. 7 to 9 comprises in particular a bearing 201 received in a housing 202 of a flange 203.
  • This bearing 201 consists of an external ring 204, an internal ring 205 and balls 206.
  • An annular elastic element 217 resiliently pushes the internal ring 205 towards the bottom of the housing 202.
  • This element 217 is an elastic washer similar to the washers 118 of the variant of FIGS. 4 to 6. Its internal ring, referenced by 219, is supported on the edge of the inner ring 205. Its end flats, referenced by 220a, are in turn supported on a rigid metal washer 218 which is itself in abutment on a shoulder 208 of the shaft A of the alternator .
  • the outer ring of the bearing can also be held in the housing of the flange by crimping.
  • the axial clearance between the shaft and the bearing makes it possible to absorb the differential expansions between the shaft A and its bearing; this clearance also allows, once the bearing in place on the flange, the mounting of the bearing on the shaft without additional stress on the bearing.
  • the operating temperature of the bearing is reduced, which is favorable for good lubrication.
  • the outer ring of the bearing being rigidly fixed, it does not undergo rotation in the presence of vibrations. This prevents wear on the walls of the housing in which the bearing is received.
  • the solution proposed by the invention is axially and radially compact. It is of reduced cost.
  • the washer or washers exert a force on the internal ring and the shoulder tending to separate them elastically while ensuring the take-up of the play without excessive axial stresses on the parts.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)
  • Support Of The Bearing (AREA)
EP96400091A 1995-01-17 1996-01-15 Wälzlager, insbesondere Hinterlager für einen Kraftfahrzeugalternator Expired - Lifetime EP0723087B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9500445A FR2729440B1 (fr) 1995-01-17 1995-01-17 Palier a roulement, notamment palier arriere d'alternateur de vehicule automobile
FR9500445 1995-01-17

Publications (2)

Publication Number Publication Date
EP0723087A1 true EP0723087A1 (de) 1996-07-24
EP0723087B1 EP0723087B1 (de) 2002-03-27

Family

ID=9475176

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96400091A Expired - Lifetime EP0723087B1 (de) 1995-01-17 1996-01-15 Wälzlager, insbesondere Hinterlager für einen Kraftfahrzeugalternator

Country Status (6)

Country Link
US (1) US5624193A (de)
EP (1) EP0723087B1 (de)
CN (1) CN1136649A (de)
DE (1) DE69620044T2 (de)
ES (1) ES2172641T3 (de)
FR (1) FR2729440B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2334629A (en) * 1998-01-23 1999-08-25 Stegmann Max Antriebstech Thrust ring in an electric motor
WO2001059913A1 (de) * 2000-02-09 2001-08-16 Robert Bosch Gmbh Federelement zum ausgleich von axialspiel einer motorwelle eines elektromotors
US8786150B2 (en) 2010-09-02 2014-07-22 Mitsubishi Electric Corporation Rotor shaft and AC generator for vehicle
EP2689989A3 (de) * 2012-07-27 2015-05-20 Jtekt Corporation Wellenscheibe, Drehwellen-Hilfsvorrichtung mit Wellenscheibe und Elektromotor mit Drehwellen-Hilfsvorrichtung
EP2149966A3 (de) * 2008-08-01 2017-06-14 Sanyo Denki Co., Ltd. Kugellagereinsatzanschlussstück für Motor

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19839407C1 (de) * 1998-08-29 2000-03-23 Bosch Gmbh Robert Elektrische Antriebseinheit
US6244565B1 (en) * 1999-01-29 2001-06-12 Ford Global Technologies, Inc. Throttle body shaft axial play control
FR2791103B1 (fr) * 1999-03-17 2001-04-13 Skf France Palier a roulement instrumente
JP2001140869A (ja) * 1999-11-19 2001-05-22 Minebea Co Ltd 複列軸受
US6409390B1 (en) * 2000-10-31 2002-06-25 Itt Manufacturing Enterprises, Inc. Compact, precision duplex bearing mount for high vibration environments
US6692177B2 (en) 2001-02-26 2004-02-17 The Torrington Company Steering shaft retaining clip
DE10214276A1 (de) * 2002-03-28 2003-10-16 Bosch Gmbh Robert Maschine, insbesondere Generator
JP2005073353A (ja) * 2003-08-22 2005-03-17 Mabuchi Motor Co Ltd ロータブッシュ及びそれを備えるモータ、並びにそれらの製造方法
US7594760B2 (en) * 2003-09-15 2009-09-29 Pratt & Whitney Rocketdyne, Inc. Bearing cup rotational lock assembly
US20070183705A1 (en) * 2006-02-09 2007-08-09 Delaney Larry W Bearing retention clamp
ES2385025T3 (es) * 2006-09-07 2012-07-17 Saint-Gobain Performance Plastics Rencol Limited Anillo de montaje de combinación
DE102006056938A1 (de) * 2006-11-30 2008-06-12 Valeo Systèmes d`Essuyage Wellenanordnung eines elektromotorischen Hilfsantriebes, Verfahren zum Sichern eines Funktionselementes auf einer Welle sowie Spreizring
EP1997746B1 (de) * 2007-05-30 2010-09-08 Eurokeg B.V. Schließventil und Behälter damit
DE102008042759A1 (de) * 2008-10-10 2010-04-15 Robert Bosch Gmbh Halterbügel zur Fixierung eines Ankerwellenlagers eines Elektromotors
JP2010190274A (ja) * 2009-02-17 2010-09-02 Nsk Ltd 転がり軸受装置及び転がり軸受の予圧方法
JP5131329B2 (ja) * 2010-08-18 2013-01-30 株式会社デンソー 自動車用交流発電機
US9509191B2 (en) 2011-09-29 2016-11-29 Panasonic Intellectual Property Management Co., Ltd. Electric motor with ball bearing assembly for rotary shaft
DE102012220985B3 (de) * 2012-11-16 2014-05-08 Aktiebolaget Skf Lageranordnung
JP6210485B2 (ja) * 2013-06-28 2017-10-11 並木精密宝石株式会社 軸受機構
CN104141820A (zh) * 2013-10-11 2014-11-12 河南航天液压气动技术有限公司 阀门用弹性限位挡圈及使用该弹性限位挡圈的阀门
US9222517B1 (en) * 2014-11-26 2015-12-29 Bradford Christopher King Tapered bearing system to minimize shaft damage and component failure
JP2019027523A (ja) * 2017-07-31 2019-02-21 日本電産サンキョー株式会社 軸受組立体およびモータ
DE102018102758B4 (de) * 2018-02-07 2020-01-16 Kendrion (Villingen) Gmbh Feder für ein Rückschlagventil, Rückschlagventil mit einer derartigen Feder, regelbarer Schwingungsdämpfer mit einem solchen Rückschlagventil sowie Kraftfahrzeug mit einem derartigen regelbaren Schwingungsdämpfer
JP7131051B2 (ja) * 2018-04-23 2022-09-06 トヨタ紡織株式会社 駆動装置
US11933357B2 (en) * 2021-06-16 2024-03-19 Schaeffler Technologies AG & Co. KG Bearing with integrated axial preload and method thereof

Citations (8)

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Publication number Priority date Publication date Assignee Title
DE471572C (de) * 1927-10-23 1929-02-14 S K F Norma G M B H Vorrichtung fuer die Einstellung von Kegelrollen- oder Schulterlagern
DE501140C (de) * 1928-12-12 1930-06-28 Schweinfurter Praez S Kugel La Federnde Vorrichtung zum Ein- und Nachstellen von Schraegrollenlagern
FR1135722A (fr) * 1954-11-24 1957-05-03 Aerzener Maschinenfabrik G M B Machine à travail ou à force motrice comportant au moins un élément rotatif autour d'un axe horizontal
CH336653A (fr) * 1957-05-24 1959-02-28 Bruno Strandgren Carl Dispositif de rattrapage de jeu
GB2147957A (en) * 1983-05-24 1985-05-22 Skf Nova Ab A device with an angular contact bearing
US4655616A (en) * 1985-09-25 1987-04-07 Magtrol, Inc. Computer direct disc drive with magnetically stabilized shaft
FR2608708A1 (fr) * 1986-12-20 1988-06-24 Mulfingen Elektrobau Ebm Ressort a disque
US5000589A (en) * 1989-06-30 1991-03-19 Kabushiki Kaisha Sankyo Seiki Seisakusho Bearing structures for motors

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1923399A (en) * 1930-03-24 1933-08-22 Johnson Pressed Gear Co Automatic take-up for shaft bearings
US2188251A (en) * 1938-10-28 1940-01-23 Dumore Company Preload adjustment for ball bearings
SE357799B (de) * 1971-10-14 1973-07-09 Atlas Copco Ab
GB1592491A (en) * 1977-02-17 1981-07-08 British Aerospace Bearing assemblies
US4364615A (en) * 1980-09-08 1982-12-21 The Bendix Corporation Retaining ring

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE471572C (de) * 1927-10-23 1929-02-14 S K F Norma G M B H Vorrichtung fuer die Einstellung von Kegelrollen- oder Schulterlagern
DE501140C (de) * 1928-12-12 1930-06-28 Schweinfurter Praez S Kugel La Federnde Vorrichtung zum Ein- und Nachstellen von Schraegrollenlagern
FR1135722A (fr) * 1954-11-24 1957-05-03 Aerzener Maschinenfabrik G M B Machine à travail ou à force motrice comportant au moins un élément rotatif autour d'un axe horizontal
CH336653A (fr) * 1957-05-24 1959-02-28 Bruno Strandgren Carl Dispositif de rattrapage de jeu
GB2147957A (en) * 1983-05-24 1985-05-22 Skf Nova Ab A device with an angular contact bearing
US4655616A (en) * 1985-09-25 1987-04-07 Magtrol, Inc. Computer direct disc drive with magnetically stabilized shaft
FR2608708A1 (fr) * 1986-12-20 1988-06-24 Mulfingen Elektrobau Ebm Ressort a disque
US5000589A (en) * 1989-06-30 1991-03-19 Kabushiki Kaisha Sankyo Seiki Seisakusho Bearing structures for motors

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2334629A (en) * 1998-01-23 1999-08-25 Stegmann Max Antriebstech Thrust ring in an electric motor
WO2001059913A1 (de) * 2000-02-09 2001-08-16 Robert Bosch Gmbh Federelement zum ausgleich von axialspiel einer motorwelle eines elektromotors
US6570287B1 (en) 2000-02-09 2003-05-27 Robert Bosch Gmbh Spring element for compensating axial play in a motor shaft of an electric motor
EP2149966A3 (de) * 2008-08-01 2017-06-14 Sanyo Denki Co., Ltd. Kugellagereinsatzanschlussstück für Motor
US8786150B2 (en) 2010-09-02 2014-07-22 Mitsubishi Electric Corporation Rotor shaft and AC generator for vehicle
EP2689989A3 (de) * 2012-07-27 2015-05-20 Jtekt Corporation Wellenscheibe, Drehwellen-Hilfsvorrichtung mit Wellenscheibe und Elektromotor mit Drehwellen-Hilfsvorrichtung

Also Published As

Publication number Publication date
ES2172641T3 (es) 2002-10-01
FR2729440B1 (fr) 1997-04-18
DE69620044D1 (de) 2002-05-02
US5624193A (en) 1997-04-29
EP0723087B1 (de) 2002-03-27
CN1136649A (zh) 1996-11-27
DE69620044T2 (de) 2002-09-19
FR2729440A1 (fr) 1996-07-19

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